Trimming device for sewing-machines.



-- L. OND'ERDONK.

TRIMMING "DEVICE FOR SEWING'MAGHINES APPLIOATION PILED AUG. 10, 1905.

Patented Dec.24,1912

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L. ONDERDONK.

TRIMMING DEVICE FOR SEWING MACHINES, APPLIOATION FILED AUG. 10, 1005.

Patented Dec. 24, 1912.

6 SHEETS-SHEET 2.

L. ONDERDONK. TRIMMING DEVICE FOR snwme MACHINES.

APPLICATION FILED AUG. 10, 1905.

1,048,204, Patnted Dec.24, 1912.

6 SHE$T8-SHEET 8.

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L. ONDBRDONK.

TRIMMING'DEVIOB FOR SEWING muamns.

APPLICATION IILED AUG. 10, 1905.

1 ()48 2 Q4 Patented Dec. 24, 1912.

5 SHEETS-SHEET 4.

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LONDERDON-K.

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1,048,204. "Miami application filed zrul jas, 1904,

1 UNITED STATES PATENT curios.

LANSING ONDERDONK, or NEW YORK, N. "1., ASSIGNOR 'ro-iINIoN SPECIAL MACHINE coMrA Y, or CHICAGO, ILLINOIS, A CORPORATION or ILLINOIS.

TRTMMING DEVICE FOR SEWING-MACHINES.

.l'oall whom it may concern Be it known that I, LANSING ONnmm'oNK,

acit-izen of the United States, residing at "New York, in the county of New York, State of New- York, have invented certain new and useful Improvements in Trimming Devices for Sewing-Machines, of which the following is a description, reference being had to the accompanying drawing, and to the letters and figures of reference marked thereon.

This application is a. division of my a plication filed July 26th, 1904, Serial 0. 218,192, patented June 28, 1910, No. 962,974, and relates to improvements in the trimming deviceused on the machine illustrated in such application, and to certain improvements relating to the construction of the cloth plate in connection with said trimmer,

and tothe provision of a guide for diverting the trimmed ofi' strip.

The invention is illustrated in the accompanying drawings, in which,

Figure 1 is a front elevation of a sewing vmachine embodying my mvention; Fig. 2 1s a detailed plan of the throat plate; Fig. 3

- is a detailed view of the upper trimmer-supporting arms; Fig. 4 is a perspective view of the inner side of'the cloth plate cover and stri -diverting guide; Fig. 5 is a sectional 39, view 'on the line 55, Fig. 4:; Figs. 6 and 7 are detail views of the strip-diverting guide with the improved device for preventing the strip from passing beneath the cloth plate of the machine; Fig. 8 is a side view of the cloth plate, illustrating the holding device for the lower cutting device; Fig. 9

isa sectional view through the cloth plate hanging arm; Fig. 16 1s a sectional View throughthe cover plate showing the spring Pi In these drawings, I use the reference numerals Ofthfi corresponding parts re- Specification of Letters Patent.

Patented Dec. 24, 1912.

Serial No. 218,192. Divided and' this application filed August 10, 1905. Serial No. 273,574. i

I ferred to in the above entitled application,

and as shown inl1igg2 the throat plate 29 is provided with the .regular slots for the feed dog, a space 30 "for the lower knife blade of the trimmer, and a tongue 31 over which the stitches are formed, and which serves to support the edge of the fabric. The throat plate also has a cutout portion 32 for the passage of the stitched edge of the material, in order not to stretch or distort the said edge. The cloth plate 33 is attached to the bed casting of the machine in the usual manner, being held in position by screws.

To the frontend is pivoted by means of a. screw 34, an extension 35, which projects to the right of the body portion,,.an d forms a rest 36 for the hand. of the operator, or to which a guide may be conveniently attached. This extension 35 is held in operative position by means of a spring 37 attached to the apron or downward extension of the cloth plate. \Vhen in operative position, the extension is in the position shown in Fig. 1.

l have attached to this machine a hinged cover 38, secured to the bed casting of the machine along itsbottom edge, by screws 39, and held in place at the top by a spring 'pin 40, see. Fig. 16, inserted in the top of the central bearing lug for the main shaft, and registering with the hole 41 in cover 38. The cover 38 carries on its outer face a guide 42 for diverting the strip severed from the body fabric, toward the front ofthe machine and away from its operating parts. This diverting guide is normally spring pressed forward by means of the springd3 pressing against the bracket l t, secured to the inner side of the cover 38 by screws 45, which pass through slots 46 in said cover.

The diverting guide is shown in two different forms in Fig. "l, and Figs. 6 and 7. That shown in Figs. 6 and 7 is the preferred form and made with a surface obliquely inclined toward the rear of the machine, which conforms to the direction of travel given .the loop spreader, and allows the ready deflecting of the trimmed ofi strip away from the machine. The upright portion 47 of the diverting guide is arranged in line with the back edge of the trimmer blades to allow them to completely sever the fabric before the deflection of the cut off lot strip is commenced. I find this an essential #837,106. The upper trimming member 50,

jection 48, which serves to close up the space. between the inclined edge 49 of the gu1de,'

and the exposed parts of the trimmer and machine, and prevents the trimmed ofi' strip from passing into the working parts of the machine.

- It will be noted by reference to Fig. 14 that aspace is provided between the cloth plate extension 36 and the diverting guide 42,'for the passage of the strip severed from the body fabric, and diverted by the diverting guide 12. The trimming device as illustrated, is similar in many respect tothat shown in a patent granted to R. G. Woodward and myself, November 27, 1906,

is carried by a lever 51 pivoted tn a bracket supported by the bed of the machine. This lever 51 may be coupledto an oscillatingarm 57 by means of a latch lever '68. The arm 67 is oscillated from the main shaft 69 by means of a link 70, and a suitable eccentric. The overhanging arm H and. needlelever L are directly above the forward end of the cutter supporting lever 51. 'The'cutter 50 as clearly shown in Fig. 15 is curved in the arc of a circle and is so arranged in i the supporting lever that it projectsforward away from the overhanging arm. 'The object of this curving of the knife is, so that when the cutter carrying lever 51 is releasedfrom the operating arm 67 and moved to inoperative position as shown in dotted lines Fig. 15, said cutter will notstrike the overhanging arm. This construction also admit-s of making the upper knife of greater length, thus admitting of its longer use before being ground away so far that it is no longer useful. a I

' Th holder 51 is provided with a slot'52' conforming with the curvature ofthe edges.

of the knife, to adjustably ho l l the same in position.

The stationary part of the trimmer is mounted on the under side of the cloth plate; and capable of being adjusted laterally with respect to the line of feed, to vary the widthof the seam, and the distance from the edge.

of the'material to the tures into the material,

The support 53 is formediwith a recess 55 for the lower stationary/blade '54. Said line of needle punc-,

stationary blade is held in place. by a block,

attached to the support .53 by a screw 56. Sald support 53 ismounted in slide-ways underneath the work plate, and is retained in position by a screw 57 passing through a slot in the apron of the work plate, and engaging the support 53 as shown in Figs. 8 and 9. This support 53 is adjusted laterits end 63 entering the threaded hole' 6 1 in the support. When it is desired to ad ust the trimmer, the screw 57'is loosened and the screw 58 turned," which moves the supportin or out, depending on which way the screw is -t=urned.

Turning the screw 58 from front to back .adjusts the support 53- to the right. It will be noted'that as the stationary member of the trimmer is moved laterally, the guide for diverting the trimmed ofi strip is also correspondingly moved.

In order to more firmly support the lower trimming blade, I have provided the supporting. pin 65 shown in detail in Fig. 11 of the drawing. Said pin 65 is threaded in the base of the machine and has a flat u er end against which the support 53 rests. This pin does not inany manner interfere with the adjustments of the trimmer support, but does take the downward thrust caused by the upper blade. The pin may be adjusted by turningthe same in its threaded bearing and adjusted position by a set l is held in its screw 66.

In. the rear of the trimmer, I have provided anedge guide 70, which as shown in the present embodiment of my invention,'is

secured to the work support and projects vertically above the same. This edge guide is substantially in the trimming line, and

the purpose of said edge guide, is to prevent the material from 'being stitched, after it passes the trimming mechanism, and the stitching mechanism from being deflected laterally into the trimmeroperating mecha-f nism. The stitched edge will pass along said. 7 vertical edge guide, and be held in proper.

position upon the work-support. Said edge guidevmay be supported in any manner, the essential feature being that said edge guide shall projectabove the works'upport and be so located relative to the trimmer operating mechanism, as toprevent thematerial being operated upon, from getting into the oper- .ative parts.

-Having thus described my invention, what I.'claim as newand desireto secure by Letters Patent, is:-- Y I g 1'. The combination-with a work support, an overhanging arm, a needle bar reciprocating on said overhanging arm, a needle carried thereby, complemental stitch-forming mechanism cooperating with said needle, and a trimming mechanism including a trimming blade, a lever carrying said trim ming blade, said lever being pivoted in the rear of the overhanging arm and extending forward underneath said arm, means for vibra-ting said lever, said trimming blade being formedon the are of a circle, extending forward and away from the overhanging arm, whereby said lever may be swung upward on its pivot, without the trimming blade striking the overhanging arm, said lever having means for supporting said trimming blade whereby said blade may be adjusted in the direction of its length.

2. A trimming mechanism for sewing machines including in combination, a work support, an upper trimming member, means for operating the same, a lower stationary trimming member, a support for said lower member located beneath the work support and on the side of saidlower trimming member opposite the upper trimming member, a screw threaded centrally into theend of said support, means for preventing longitudinal movement of said screw relative to the work support, whereby the trimmer support may be adjusted, and means for holding said trimmer support in its adjusted positions.

3. In a sewing machine including in combination, a trimmer, comprising an upper movable member, a lower stationary member cooperating therewith, a support having a projecting arm carrying said lower member, and an independent adjustable vertical member for supporting the free end of said arm. j 7

4. A sewing machine including in combination a trimmer comprising an upper movable member, a lower stationary member cooperating therewith, a support having a projecting arm carrying said lower member, means for ad usting said support whereby said lower member is adjusted relative to substantially-in rear of the stitching point and supporting said movable member, means for vibrating'sald arm, and a vertical guide located in the rear of the stitchingpoint and substantially in the trimming line, whereby the edge of the material after it passes the trimmer and stitch forming mechanism, may be guided in the proper direetion, and kept away from the movable arm.

6. In a sewing machine for forming overedge stitches, a work support and an overhanging arm, a trimmer comprising an upper movable member and a lower stationary member cooperating therewith, said trimmer severing the fabric in advance of the stitch-forming mechanism, said upper trimming member including an arm and a blade, the latter being formed'in the are of a circle, extending forward and away from the overhanging arm, whereby said trimmer may be brought elose to the needle without striking the overhanging arm, said arm having means for supporting said trimming blade;

whereby said blade may be adjusted longitudinally.

In testimony whereof I affix my signature, in presence of two'witnesses.

V LANSING ONDERDONK. Witnesses:

J. H. HOWELL, C. D. CHURCHILL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. 0. 

